Water cooler for furnaces



March 23, 1937. w. P. CHANDLER, JR

WATER COOLER FOR FURNACES Filed Aug. 15, 1956 INVENTOR Patented 23, 1937 UNITED STATES PATENT. OFFICE WATER COOLER FOR FURNACES Willard P.Chandler, In, Pittsburgh, Pa, assimito Blaw-Knox Company, Pittsburgh,Pa., a corporation of New Jersey Application August 15, 1936, Serial No.96,207

6 Claims.

cooler has a body portion forming the top of,

the frame and from each end of the body portion there is a downwardlyextending leg forming the sides of the frame.

the furnace chamber from the bottom of the body portion there is ahorizontally extending hollow ofiset portion forming a nose portionwhich acts as a cooler for the skew-back channel which is positionedimmediately thereabove. In the structure disclosed in said patent, awall is provided between the nose portion and the main chamber or bodyportion of the frame, therebyproviding means for positively circulatingthe 5 cooling water through the nose portion. The connections to thecooler are arranged so that the inlet to the-frame is connected by meansof a pipe to the central part of the nose portion and a con- :nection isprovided at each end of the nose portion for discharging the waterpassing through the nose portion into the leg portions of the frame at apoint near the base thereof.

Considerable advantage is derived from a construction of this characteras compared with prior art constructions but'the construction disclosedin said patent results in difliculties which it is the object of thepresent invention to overcome.

In the construction disclosed in the Robinson 40 patent the water, whichis cold when it enters the frame, is led to the center of the nosepiecethrough the connections described above. The

cold water divides and passes in both directions,

one-half being discharged through each 'of the '45 end openings in thenose portion. It has been discovered that serious corrosion is createdon the plate of the nose piece directly .opposite the in let and on thevertical front face of the nose piece close to both of the outlets. Thiscorrosion is caused by the free oxygen contained in the water. Thewater. enters the nose portion at a relatively cold temperature and theoxygen is thrown out of solution by the intense heat of the platesforming the nose portion which, as

stated above, extends into the furnace and is sub,-

,iected to intense heat. The oxygen in the cold water is liberateddirectly on the iron plates form- 'ing the nose portion and thecorrosion referred to above takes place as a result thereof." I havefound that this corrosive action can be Projecting inwardly intoeliminated to a very substantial extent if the water used for coolingpurposes is initially heated before coming into contact with theextremely hot surfaces of the nose portion of the cooler.

The oxygen or other gases dissolved in the water pass out of solutionwhenthis initial heating action takes place and rise as bubbles. Thesebubbles are small and will pass upwardly within the water in thecooler'without coming into direct contact with the iron of the cooler atany place where the temperature is sufiiciently hot to cause corrosion.Thus a considerable portion of the oxygen is liberated before the waterreaches the place where the temperature is hottest and corrosion mostlikely. 1

In accordance with my invention I propose to provide connections in astructure generally of the character disclosed in the above referred toRobinson patent which are so arranged that the cold water will becarried by pipes or other suitable means ,to a point adjacent the bottomof the leg portions. At this point the temperature is considerably lowerthan that of the nose portion. The water is then permitted to risethrough the frame and an inlet opening is provided near one end of thenose portion so as to permit the rising waterto enter the nose portionand flow therethrough. An outlet is provided adjacent the other end ofthe nose portion so as to permit the escape of'water passing into thenose portion. The outlet therefrom is connected by a pipe or othersuitable means to the outlet opening for In the accompanying drawing Ihave shown for.

purposes of illustration only the present preferred embodiment of myinvention. In the drawing, 7

Figure 1 is a front elevation of the cooler which I provide; s

Figure 2 is a vertical sectional view takenalong the line II-IIof'Figure 1; and

Figure 3 is a horizontal sectional view taken along the line III-III ofFigure 1. In the drawing there is shown a portion i of a furnace roof.and a skew-back 3. The skewback is supported by a channel I. accordingto well-known practice. I

A cooler indicated generally by the reference character I-has a bodyportion i formingthe top of the frame, and from each end of the bodyportion there is a downwardly extending leg I, which-legs form the sidesof-the frame. Projecting inwardly into the furnace chamber from thebottom of the body portion 6 is a horizontally extending hollow offsetportion 8 forming a nose portion which acts as acooler for the skew-backchannel.

The nose portion 8 is separated from the body portion 6 of the frame bya wall 9 so as to aid in bringing about proper circulation of the waterthrough the nose portion. The nose portion is provided with an inletopening I 0 which is adjacent one end thereof and with an outlet openingl| adjacent the other end thereof. The outlet opening H is connected bymeans of a pipe I! with the outlet l3 for the frame.

The cooling water enters the cooler through an inlet I 4 and byappropriate pipes or conduits l5, l6 and I1 is delivered to the legs ofthe frame and adjacent the bottom thereof. The water then passesupwardly through the legs of the frame and through the inlet opening IIIof the nose portion, horizontally through thenose portion, and isdischarged from the nose portion through the outlet II and from theframe by the outlet i3 which, as stated above, is connected to thenoseportion outlet I l by means of an appropriate conduit.

A vent opening I8 is provided in the pipe l2 adjacent the top of thecooler for permitting the oxygen or other gases accumulating in the bodyportion 6 as a result 'of the heating of the water to escape with theheated water As stated above, ina construction of this character, thewater may be fed to the frame at a low temperature and corrosionresulting from the bringing of relatively cold water into contact withmetal is eliminated by the provision of connections which are soarranged as to discharge the water into the frame at points where thetemperature is considerably below the temperature of the nose portion.By so doing, a heating of the water as it rises inv the frame liberatesthe oxygen and gases so that when the water comes into contact with thehot plates forming the nose portionof the frame, corrosion will not takeplace. Although the water is fed to the nose portion at a somewhathigher temperature than would be the case ina construction such as thatdisclosed in the Robinson patent above referred to, corrosion incidentupon the use of ,a construction wherein the cold water is immediatelycoming in contact with the'hottest part of the furnace cooler iseliminated.

While I have shown and described a preferred embodiment of my invention,it will be understood that my invention is not limited to theconstruction shown in the drawing and described aboveas it may beotherwise embodied within the scope of the appended claims.

I claim:

, 1. A hollow water-cooled furnace door frame and skew-back channelcooler, compris ng a body portion forming the top of the frame, legsforming the sides of. the frame, a hollow horizontal offsetseparatedfrom the main body of the frame by a wall and adapted toproject into the furnace chamber beneath the skew-back channel andforming a nose portion, and connections for causing flow of waterinitially through the legs of the frame and thereafter through the nosethereof and for dischargin the water from th frame directly from thenose portion. 2. A hollow water-cooled furnace door frame and skew-backchannel cooler having inlet and outlet openings, comprising a bodyportion forming the top of the frame, legs forming the sides of theframe, a hollow horizontal offset separated from themain body of theframe by a wall and adapted to project into the furnace chamber beneaththe skew-back channel and forming a nose portion, and connections forcausing flow of water initially through the legs of the frame andthereafter through the nose portion, the nose portion having an inletopening adjacent one end thereof and an outlet opening adjacent theother end thereof, the outlet opening in the nose portion beingconnected directly to the frame outlet. 3. A hollow water-cooled furnacedoor frame and skew-back channel cooler, comprising a body portionforming the top of the frame, legs forming the sides of the frame, ahollow horizontal offset adapted to project into the furnace chamberbeneath the skew-back channel and forming a nose portion, the bodyportion and .the nose portion being separated by a wall, the frame andnose portion each having an inlet and an outlet,

and a conduit directly connecting the nose portion outlet and the frameoutlet. I

4. A hollow water-cooled furnace door frame and skew-back channelcooler, comprising a body portion forming the top of the frame, legsforming the sides of the frame, a hollow horizontal offset adapted toproject into the furnace chamber beneath the skew-back channel to form anose portion, the body portion and the nose portion being separated by awall, the frame having inlet connections for supplying water to a pointnear the bottom of at least one of the legs, the nose portion having aninlet opening communicating with the frame and an outlet opening, and aconduit connected with the outlet opening of the nose portion fordischarging water directly from the frame. 5. A, hollow water-cooledfurnace door frame and skew-back channel cooler, comprising a bodyportion forming the top of the frame, legs forming the sides of theframe, a hollow horizontal offset adapted to project into the furnacechamber beneath the skew-back cooler and forming the nose portion, thebody portion and the nose portion being separated by a wall, the framehaving an inlet for supplying water to a point near the bottom of atleast one of the legs, the nose portion having an inlet openingcommunicating with the frame adjacent one end thereof and an outletopening adjacent the-other end thereof, and means connected with theoutlet opening of the nose portion for discharging water directly fromthe frame.

6. A hollow water,cooled furnace door frame and skew-back channelcooler, comprising a body thereafter horizontally through the noseportion thereof, and thereafter directly from the frame.

WILLARD P. CHANDLER, Jn.

